Deconstructing sugarcane bagasse lignocellulose by acid-based deep eutectic solvents to enhance enzymatic digestibility

Author(s)

Guadalupe Moran-Aguilar, Maria ; Calderon-Santoyo, Montserrat ; de Souza Oliveira, Ricardo Pinheiro ; Guadalupe Aguilar-Uscanga, Maria ; Manuel Dominguez, Jose

• Document type: Journal article
• Source: Carbohydrate Polymers; v. 298, p. 8-pg., 2022-12-15.

Abstract

Biorefinery with deep eutectic solvent (DES) is an emerging processing technology to overcome the shortcomings of conventional biomass pretreatments. This work evaluates the biorefinery of sugarcane bagasse (SCB) with DES formulated with choline chloride as hydrogen bond acceptor and three hydrogen bond donors: lactic acid, citric acid, and acetic acid. Acetic acid showed unique ionic properties responsible for the selective removal of lignin and the deconstruction of cellulose to improve the digestibility of up to 97.61 % of glucan and 63.95 % of xylan during enzymatic hydrolysis. In addition, the structural characteristics of the polysaccharide-rich material (PRM) were analyzed by X-rays, ATR-FTIR, SEM, and enzymatic hydrolysis, and compared with the original material sample, for a comprehensive understanding of biomass deconstruction using different hydrogen bond donors (HBD) as DES pretreatment. (AU)

• FAPESP's process: 18/25511-1 - Bioprospecting of bacteriocin-producing bacteria: from culture optimization to the application in animal production systems
• Grantee: Ricardo Pinheiro de Souza Oliveira
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 21/15138-4 - Brewery waste biorefinery to obtain biologically active substances for prevention and treatment of SARS-CoV-2 and for its use as natural food preservatives
• Grantee: Ricardo Pinheiro de Souza Oliveira
• Support Opportunities: Research Grants - Visiting Researcher Grant - International